2007-10-05 09:51:51 · 5 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
Area of square = x² (where x is length of side
therefore x = square.root(of the area)
SQ.root(400) = 20
each tile is 20cm * 20cm
Each tile is 400cm² therefore each tile is 20*20 (L*W)
2007-10-05 09:54:48 · answer #1 · answered by David F 5 · 0⤊ 0⤋
The area or surface of a square is calculated by S=a^2, "S" being the surface area and "a" being the length of a side. Therefore if S=400, then a=square root of 400, which is 20. So the dimensions of each mirror are 20cm by 20cm.
25 is an immaterial figure here because it shows the number of square tiles and does not affect each square individually.
2007-10-05 17:01:03 · answer #2 · answered by fakelinker 2 · 0⤊ 0⤋
A square tile must have the same L and w
L*w = 400 cm^2 ; but L =w so take either one
w*w =400 cm^2 or w^2 = 400 cm^2 ; now tak sqrts
w = 20cm.
Each tile is 20cm x 20 cm.
Hope this helps.
2007-10-05 17:19:23 · answer #3 · answered by pyz01 7 · 0⤊ 0⤋
sqrt(400/25) = 4 cm x 4 cm
2007-10-05 16:55:21 · answer #4 · answered by gjmb1960 7 · 0⤊ 0⤋
more importantly, why are you using mirror tiles? To be modern? Because it sounds tired and gross.
2007-10-05 17:00:28 · answer #5 · answered by Seaweed G 4 · 0⤊ 0⤋